documentation/poky-ref-manual/figures/ss-sato.png: Added this file.

I moved this file from the screenshots directory to the figures
directory so that all figures would be in the figures directory.

(From yocto-docs rev: 61859fc26aee841b05b082a373c09f56e006d7b3)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>